Finishing machine plate stop



July 1, 1941. L. J. GRlNr-:R Erm.

\ FINISH'ING MACHINE PLATE STOP Filed July 12, 1958 2 Sheets-Sheet lJuly 1, 1941.

L. J. GRINER E-rlpu. 2,247,997

FIISHING MACHINE PLATE- STP 2 Sheets-Sheet 2 Filed Jul-y 12, 1958 @we270% fn'ffef.

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Patented July 1, 1941 UNITED STATES PATENT OFFICE FINISHING lllACHIN-EPLATE. STOP a corporation of Virginia Applicationv July 12, 1938,SelialNo. 2181.793

(Cl. 29-21l 6 Claims.

This invention relates to a plate stop for a finishing machine andparticularly for a pony autoplate stereotyping machine.

The principal objects of the invention are to provide a new and improvedmeans for positioning the stereotype printingv plate in such a Way thatthe cast bevel end of the plate is used as the locating point to co-actwith a novel design of plate stop which will stop the plate in just theproper position for the iinishing operation; to provide a very accuratelocation of the platewith reference to the cut-off saw and trimming toolsince the cast beveled end of the plate can be made to contact with thestop snugly and thereby contact all plates in a simple and accuratemanner.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be hadto the accompanying drawings, in which Fig. 1 isan end View of a pony autoplate machine, looking toward the shavingarch;

Fig. 2 is a central longitudinal sectional view through the shaving archshowing the plate and tail being pushed intoit;

Fig. 3 is a similar View showing the plate and its tail in its nalposition against the stop;

Fig. 4 is a longitudinal sectional view through the stop in the positionin which it holds the plate in proper position;

Fig. 5 is an end View of a plate stop;

Fig. 6 is a longitudinal sectional View showing the beveling tool forthe end of the plate;

Fig. 7 is an end view of the arch showing a modified form, and

Fig. 8 is a view similar to Fig. 4 on the line 8-8 of Fig. 7 showing thesecond form of plate stop.

It is well known that stereotype plates IB, as produced in the ponyautoplate machine, are cast with one end beveled to size at I I and theother end with a blank portion I2 of its length, known as the tail,which must be severed from the useful length of the plate before theplate can be used on the press. 'I'his severing operation isaccomplished by a cutting 01T saw I3. A beveling tool I4 carried on therotating knife bar I5 bevels the opposite end edge. They are sopositioned relative to plate stops, on the knife bar bearing, as to cutoi the plate to the correct length and bevel.

Heretcfore lugs have been cast, during the stereotype casting process,on the inside of the tail, these lugs serving to co-act with the stopreferred to above on the knife bar bearing to position properly theplate for the severing and beveling operation. Obviously, this lug,being on the inside of the tail and out of the vision of the operator,the method of positioningv the plateA has met with considerabledisfavor` in the trade. To correct this situation this present inventionrelates to a new and improved method of positioning the plate, in whichthe case lug on the inside of the tail has been dispensed with and inits stead the cast bevel end II of the plate is used as the locatingpoint to co-act with a novel design of the plate stop- In the form ofthe invention shown in the rst six figures, the plate I0 with itsintegral tail I2 is pushed by hand into the arch 9 in the direction ofthe arrow in Fig. 2. As it moves. in thisl direction, it passes along astop II pivoted at I8 and counterweighted so as to bring the upper endof it inside the plate. When' the plate is passed through beyond thestop I'I., the stop turns by gravity to the vertical position shown inFig.. 3.

It is to be understood' that the plate is manipulated by hand over theusuall knife bar I5 and when it comes to a position where the'stop tipsup as just stated, the plate is moved back by hand against this stop.which is' positively prevented` from turning backwardly. This s-topismounted on a casting I-9 which is concaved on the bottom to t thecontour of the knife bar I5.

The casting I9 is provided with longitudinally elongated slots 2l), intowhich extend screws 2|. This casting I9 can be adjusted by a screw 22andy the screws 2| tightened down to hold the stop in place to providefor the adjustment to printing plates of various lengths. The positionin which the stop I'I can beheld can be varied slightly by means of astop screw 23. This provides a simple and accessible mea-ns: ofadjustment.

In operation, the stereotype plate and tail are pushed into the arch, inthe direction indicated by the arrow, causing the stop lever to assumethe position shown in Fig. 2. It is pushed a little further until it haspassed the stop lever to permit that lever to return by the action ofgravity to its normal position, as shown in Fig. 3, but in this case theplate is spaced from the stop. The plate is now pulled back by handuntil it is placed with its cast bevel edge against the stop lever, asshown in Fig. 3. It is now positioned relative to the saw I3 and thetrimming or beveling tool I4.

In the form shown in Figs. 7 and 8 the stop is modiiied in two parallelways. The first modication consists in providing two stops which arespring-seated instead of the single counterweighted stop, abovedescribed. In a similar manner a casting'30 is secured to the knife barin a conventional manner. The plungers 3l are arranged at a suitabledistance apart around the circumference and extend radially. They areslidably mounted in sockets in the casting 3l) so that they movereadily. Springs 32 are provided for normally moving them outwardly.Their outward motion is limited by stop screws 33.

As the plate with its tail passes over these stops, the springs arecompressed, permitting the stop proper to be depressed by the Weight ofthe plate.

When the plate passesv over the stops they will l ables the operator tooperate the plate by one hand and locates that hand at the center ofthe` semicircular edge. f

In both these designs, it is evident that a very accurate location ofthe plate with reference tov the cut-off saw and trimming tool can beaccomplished. They perform their function in a long Well known manner.The beveled end of the plate which is cast, as contrasted with a beveledend which is finished, may be made to contact the stop snugly andthereby locate all plates which come through the machine, one afteranother, in a simple and accurate manner. This also avoids thedifficulties mentioned at the beginning of the specification.

Having thus described our invention and the advantages thereof, we donoft wish to be limited Y to the-details herein disclosed, otherwisethan as set forth inthe claims, but what we claim is:

. 1. The combination with a stereotype plate nishing machine providedwith an arch for receiving the plate to be finished and a knife bar, ofa movable stop mounted on the bar in the arch beneath theVr plate andadapted to contact the inner surface of the plate while it is beingmoved into the arch, and means for automatically bringing the stop intoposition at the rear of the plate to prevent the movement of the plateback beyond the stop.r v

2. The combination with a stereotype plate finishing machine providedwith a finishing arch and a knife bar, of a movable stop mounted on thebarV within the arch and beneath the plate as it is being moved intoposition Within the arch and -contacting the underside of the plate,said stop being yieldable to allow the plate to move in its normalcourse into a position-for finishing and also capable of moving into aprojected position behind the rear edge of the plate when the platepasses over it and releases it and is in the proper position within thearch for finishing.

3. The combination with a stereotype plate finishing machine providedwith an arch for receiving the plate to be finished and a knife bar, ofa counterweighted pivoted stop mounted on the bar in said arch beneathIthe plate, the stop contacting the inner surface of the plate as theplate is being moved into the arch, the stop turning on its pivotforwardly with respect to the plate and, when the plate moves beyond thestop, the vstop automatically turns up to vertical position where theupper portion thereof projects beyond the bottom of the inside of theplate at the edge thereof and prevents the movement of the plate backbeyond the stop.

4. The combination with a stereotype plate 1inishing machine providedwith a rotating knifebar carrying a cutting device, and having an archfor receiving the plate through one end thereof, of an upwardly movablestop mounted on the bar within the arch and beneath the plate when sameis inserted into the arch in position to contact and engage theundersurface of the plate as it is moved into the arch, -the plateholding the stop down until the end of the plate passes the stop, and aspring beneath the stop for forcing the stop up beyond the back edge ofthe plate at that time, thus preventing movement of the plate backbeyondthe stop.

5. The combination with a stereotype plate holding arch arranged forreceiving the plate in a straight line through one end thereof andprovided with a rotary knife bar carrying a cutting device, of a movablestop located on said bar in position to engage the inside of the plateas it is moved into the arch, whereby the plate will hold n the stopdown until the end of the plate passes the stop, a spring under the stopfor forcing the stop out beyond the back of the plate as the platepasses the stop, and means for limiting the motion of the stop outwardlyin the arch.

6. The combination with a stereotype plate fmishing machine providedwith a rotating knife bar carrying a cutting device and having an archfor receiving the plate through one end thereof, of a movable stopmounted on said bar beneath the plate having a portion contacting theinner surface of the plate as it is being moved Within the arch, andmeans for automatically moving the stop into position at the rear of theplate to pre- Y CERTIFICATE OF CORRECI ON lPatent No. aime-97. July 1,19in.

LESLIE "JOHN GRINER, ET AL.

It is hereby certified that error appears in the 4printed specificationofthe above numbered patent requiring,- correction as. follows: Page l,second column, line 8, for the word "case" read --cast; line 5b., for"parallel" read principal-q and that the said Letters Patent should beread with this correction therein that the samemay conform to the recordof the case in the Patent Office.u

Signed 'and sealed this 5th day`o` August, A. D. l9lpl.

Henry Van Arsdal'e, (Seal) Acting Commissioner of Patents.

